diff --git a/src/App.js b/src/App.js
index 091aa0a5..39da14b4 100644
--- a/src/App.js
+++ b/src/App.js
@@ -1,5 +1,42 @@
+import { Console } from "@woowacourse/mission-utils";
+
 class App {
-  async run() {}
+  async run() {
+    const divChr = [",", "/", ":"];
+    let result = 0;
+    let numbers;
+    let input = await Console.readLineAsync();
+    console.log(input);
+
+    if (input.startsWith("//")) {
+      const parts = input.split(/\\n/);
+      const customDiv = parts[0].replace("//", ""); // ";"
+      for (let i = 0; i < customDiv.length; i++) {
+        divChr.push(customDiv[i]);
+      }
+      numbers = [parts[1]];
+    } else {
+      numbers = [input];
+    }
+
+    console.log(numbers);
+    divChr.forEach((chr) => {
+      numbers = numbers.flatMap((part) => part.split(chr));
+    });
+
+    numbers.forEach((str) => {
+      const num = Number(str);
+      if (isNaN(num) || str.trim() === "") {
+        throw new Error("[ERROR] 잘못된 입력 입니다.");
+      }
+      if (num < 0) {
+        throw new Error("[ERROR] 음수는 입력할 수 없습니다.");
+      }
+      result += num;
+    });
+
+    Console.print(`결과 : ${result}`);
+  }
 }
 
 export default App;